Impression adjustment for printing-presses.



C. B. SWINK. IMPBBSSION ADJUSTMENT FOR PRINTING PRESSES.

AP PLIOATION FILED MAY 13, 1910.

2 BHEETSSHEET l.

humu- Patented July 25, 1911.

APPL IOATION FILED MAY 13, 1910.

Patented July 25, 1911. v

2 SHEETS-SHEET 2,

W/TZVE'SEE'EI' Nanny-nu; III" mm. wsnmum n c.

. WEED AT oHARL-ns IB. SWINK, or DELPHOS, OHIO, ASSIGNOR TOY-THE V GOMPANY,;0F-DELPHQS, OHIO, aoonronarioiv or oHI'o.

998, 863. Application filedi May To allwhom it may concern.

Be it known that I, CHARLES B. a citiiefiof the United-States, and a res1-' dent of Delphos, in the county of Allen and State of Ohio, have invented a certain new and useful Impression Adjustment for Printing-Presses; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it 'a'ppertains to make and use the same, reference being had to the accompanying drawings, and to thereon, which form a part of tion.

- lVly invention relatesto printing presses of the type in'which an impression cylinder works over a reciprocatory bed plate, and has particular reference to means for conthis specificatrolling the vertical reciprocatory movements of the cylinder for moving it out of form' engaging position on each stroke or I the bed plate in one direction.

The object of my invention is the provision of improved means of the class described. which is simple in .its construction, positive in its operation, more easily adjusted than the means of this class heretofore used, and in short overcomes thedifficulties incident to the use of such earlier means.

The invention is fully described in the following specification, and a preferred embodimentthereof. illustrated in the accompanying drawings, in which,;-

Figure 1 is a side elevation of the press frame with the operative parts of my invention associated therewith, Fig. 2 is a cross' section of the same on the line w m in Fig. 1. Fig. 3 is an enlarged view of a portion of the impression adjusting parts. Fig. 4 is an enlarged detail of the cam-shaft and associated rocking parts, with portions broken Fig. 5 is a cross-section on the line 3 in Fig. 4. and Fig. 6 is a plan view of a portion of such shaft. its rock-arm and a portion (if the associated controlling parts.

Referring to the drawings 1, 1 designate the-frame sides of a press, 2 the impression cylinder, which has the ends 3 of its shaft journaled in bearing blocks 4. These bearing blocks are guided for vertical movements within guide portions 5 of the frame, as is Imrnnssion ADJUSTMENT iron rnrnrrne-rri assns.

Y Specification of LettersBatent. Patented'July SWiNK,

the figures of reference marked to talie an impression during a movement 0 5 the bed-plate 17 in one direction and thelower ends of which rest upon: coiled compression sprlngs the frame'sides.

Eacli bearing block 4 is connected by rods 8 toa subjacent bearing block'9, which guided for vertical movements within an opening 10 in the lower portion of the asso- 7 suitably. mounted in "ciate'd frame side and 'forms' the lower bearing oi pillow block for' an" end of a rockshaft 11', which is mounted transverselyfof the frame beneath the cylinder 2.. The lupp'er thrustof each end of the shaft]. 1' in opposed-by an'impression adjustment block 12, which is mounted for vertical adjusting movements in ways 13 'of the frame side. A

single adjusting screw 14 is threadedinto the upper side oftheblock and has its upper end thrust against areqistering superimposed fram'e surface 15. The screw 141135 a collar or nut 16 threaded thereon 'fOIICO- acting with the-block surface to lock'the screw in adjusted position. It is thus apparent thatwith this construction the impression of the cylinder can be adjusted'to anicety by simply loosening the lock-nut or collar 16 and then turn q 't-he screw 14 to raise or lower the blticss 12. which acts through the shaft 11, block 9 and rods 8 to either lower the cylinder bearing-blocks 4 against thetension of the spring 7 "or to permit a raising of the blocks 1 under the influence of such spring, thus obviating the slow and unsatisfactory method heretofore commonly employed of adjusting the block 9 upon the carrying rods 8.

The rock-shaft 11 Has the portions of its ends which are inbearing contact with the blocks 9 and 12 provided with the semi-circular cam-surfaces 11', which upon a rocking of the shaft, act to cause said blocks to move toward or away from each other, as is apparent. I

The mechanism shown for intermittently rocking the shaft "11 to lower the cylinder to perunit a raising of the cylinder to prevent the;- t-aking of an impression upon the return stroke of the bed-plate will now be described. Keyed to the shaft 11 is an arm 18, and this is connected by a rod or link 19 to a lever 2t), which is pivoted at its lower end toa bracket 21 and carries a roll 22 for working in the cam-groove 23 in the side of a spur-gear 24. The gear 24 is mounted 13,1919. Seria1No.561,163. f

f me

on a shaft .25 and .driven. by a small gear -26, carried by a-drive-shaft 27, which latter shaft is. journald in the frame 'and carries 2, belt-pulley 27' atone end without the" rame. I

The cam-groove 23 has the opposed neutralportions a and band the-connecting cam portions 0,0. Upon the compression stroke of thebed the roll'22 moves to and traverses the neutral portion a of the groove, thus moving the-lever. 20, rod 19 and arm 18 to rock the shaft 11 to effect a lowering of the block 9 and attached parts to lower the cylinder 2 to impression position, and upon the gear32 onan end of the cylinder shaft- 3.-

' The gears which communicate rotation from returnstroke of the bed the roll-22 returns toandworks in the portion 6 of the groove, thuscausing the actuating parts to return tojthei position shown and, permitting the cylinder to raise out 'of impression position.

The shaft25 carrying the gear 24 also carries a gear 28 in mesh with agear 29 on a shaft 30, suitably journaled in the frame,

and such shaft 30 carries a gear 31 without the frame, which meshes with and drives a the s'haft25 to the'cylinder2 areso proportioned that the: cylinder makes two revolutionsto one ,of the vgear. 26', thus causing the cylinder tomake" acbiaaplete revolution ateach forward and backward stroke of the,

bed-plate. v

Should the operator fail to feed a sheet to, the cylinder at each impression stroke, the .-'taking of an impression may be prevented by :tnpping' the foot lever 33.- This lever 11'. Thesleeve 38 is fixed to the key 39,

which is mounted in a key-Way in the shaft and movable into and out of engagement with a socket. 40 in the arm 18. It is thus apparent that when the key is shifted out of clutch engagement with the arm 18, such arm can oscillate freely on the shaft 11 without rocking it to lower the cylinder for an impression.

I'wish it understood that my invention is not limited to any specific construction and arrangement of the partsexcept in so far as such limitations are specified in the claims.

Having thus described my invention, what I claim as new and desire to secure by "Letters Patent, is, I

1. In a printing press, the combination with an impression adjusting rock shaft of an arm mounted on' such shaft, means for imparting intermittent rocking movements to such arm,- a key feathered to the shaft and movable to lock and release said arm relative to the shaft,-and tri means connected to such key, andmovab e to effect an en-' gagement or release of the key with the shaft. "3-

2, In a' printing press, the combination with an impression rock-shaft of an arm mounted thereon, a wheel havinga cam groove in a side.thereofi a-lever, a roll car ried by such lever and working-jn the. cam

, groove, connection between-{the leverand rock-shaft tocommunicate] movement ;from

oneto the-other, and manually-(controlled means for relatively engaging or releasing the rock arm and tantially' as deshaft,- scribed.

In testimony whereof; I] have hereunto signed in name to this specificationin the presence of two subscribin' witnesses."

CHARL S B. SWINK Witnesses: Y

GEO. S. W

EGER, A. F. LINDEMA N. 

